Add a meta institution with specific courses that allow other services to test against before moving onto the real data

[EvilKanoa]

Is your feature request related to a problem? Please describe.
As a developer of other products, I want to be able to ensure that my system integrates correctly with webadvisor-api and test against multiple different scenarios that are rare to find in real-world data.

Describe the solution you'd like
Add a META institution with a documented listing of courses for different testing purposes. I will include a few suggested META courses to include for initial development. Ideally, these META courses will evolve to include many different cases and will allow developers to test different aspects of their products by targeting the META institution.

Currently, most scenario based integrations use the Course query, thus the META institution will only include courses under that query to start.

META Courses

• META*1000: Generic course with all data present.
• META*1100: Empty course.
• META*1110: No sections.
• META*1120: No meetings but 1 section.
• META*1200: One section with available slots cycling between all and none every X minutes.
• META*1210: One section that always has available slots.
• META*1220: One section that never has available slots.
• And more!